Does anyone know of a source to obtain a 1kg samples of "ore concentrates" - the specific composition is unimportant but in a silica matrix?

Looking for a sample of a concentrate from an ore body with a a silica matrix containing a metal or mixture of metals e.g. Ti, Zr, REEs, even in very small quantities. Examples include "zircon...

19 August 2019 9,801 2 View